Prevalence of headaches in individuals referred from primary care to secondary care. Headache Medicine, [S. l.], v. 2, n. 4, p. 200–203, 2011. DOI: 10.48208/HeadacheMed.2011.29. Disponível em: https://headachemedicine.com.br/hm/article/view/191. Acesso em: 22 jan. 2026.